ObPlacer (or Object Placer for full) and ObPlacer XML are tools that allow you to place scenery object while slewing around in Flight Simulator. ObPlacer lets you place API macros, while ObPlacer XML lets you place library objects, effect files and MDL objects using the new XML format.

This is especially useful if you only want to place a couple of objects in a city or town for example, because you don't have to setup an new project in a tool like Airport for Windows or FSSC.